1) BAL-001 Real Power Balancing Control
Performance
Area Control Error (ACE) - CORRECT ANSWER-The instantaneous difference
between a Balancing Authority's Actual Net and Scheduled Net Interchange,
considering the effects of Frequency Bias, and correction for meter error.
Reporting ACE - CORRECT ANSWER-Really it just means the ACE number you
report in MWs, which includes the difference between the Balancing Authority's
Actual Net Interchange and its Scheduled Net Interchange, plus its Frequency
Bias obligation, plus any known meter error.
Regulation Reserve Sharing Group - CORRECT ANSWER-A group whose
members consist of two or more Balancing Authorities that collectively maintain,
allocate, and supply the Regulating Reserve required for all member Balancing
Authorities to use in meeting applicable regulating standards.
Reserve Sharing Group Reporting ACE - CORRECT ANSWER-The sum of the
Reporting ACEs of the Balancing Authorities participating in the Regulation
Reserve Sharing Group.
Control Performance Standard (CPS) - CORRECT ANSWER-The Reliability
Standard that sets the limits of a Balancing Authority's Area Control Error over a
specified time period.
Dynamic Schedule - CORRECT ANSWER-A time-varying energy transfer
updated in Real-time and included in the Scheduled Net Interchange (NIs) term
in the affected Balancing Authorities' control ACE equation.
Inadvertent Interchange - CORRECT ANSWER-The difference between the
Balancing Authority's Actual Net Interchange and Scheduled Net Interchange
(NIa - NIs).
Interconnection Time Monitor - CORRECT ANSWER-The Reliability Coordinator,
designated by the NERC Operating Committee, that monitors Time Error and
, initiates and terminates Timer Error Corrections. There is only one
Interconnection Time Monitor in each Interconnection.
Joint Control - CORRECT ANSWER-Automatic Generation Control of Jointly
owned units by two or more Balancing Authorities.
Overlap Regulation Service - CORRECT ANSWER-A method of providing
regulation service in which the Balancing Authority providing the regulation
service incorporates another Balancing Authority's Actual Net Interchange,
Frequency Response, and schedules into the provided Balancing Authority's
AGC/ACE equation.
Pseudo-tie - CORRECT ANSWER-A time-varying energy transfer that is updated
in Real-time and included in the Actual Net Interchange term in the same manner
as a Tie-line in the affected Balancing Authorities' control ACE equation. (A fake
tie-line)
Tie-lines - CORRECT ANSWER-A circuit connecting two Balancing Authority
Areas.
Time Error - CORRECT ANSWER-The difference between the Interconnection
time measured at the Balancing Authorities and the time specified by the
National Institute of Standards and Technology. Time error is caused by the
accumulation of Frequency Error over a given period.
Time Error Correction - CORRECT ANSWER-An offset to the Interconnection's
scheduled frequency to return the Interconnection's Time Error to a
predetermined value.
Epsilon - Sub one (ε1) - CORRECT ANSWER-A constant derived from the
targeted frequency bound. It is the same for every Balancing Authority Area
within an Interconnection and is the limit for determining a Balancing Authority's
compliance with CPS1.
Automatic Time Error Correction (ATEC) - CORRECT ANSWER-A component of
ACE (only done in the Western Interconnection) that modifies the control point for
Performance
Area Control Error (ACE) - CORRECT ANSWER-The instantaneous difference
between a Balancing Authority's Actual Net and Scheduled Net Interchange,
considering the effects of Frequency Bias, and correction for meter error.
Reporting ACE - CORRECT ANSWER-Really it just means the ACE number you
report in MWs, which includes the difference between the Balancing Authority's
Actual Net Interchange and its Scheduled Net Interchange, plus its Frequency
Bias obligation, plus any known meter error.
Regulation Reserve Sharing Group - CORRECT ANSWER-A group whose
members consist of two or more Balancing Authorities that collectively maintain,
allocate, and supply the Regulating Reserve required for all member Balancing
Authorities to use in meeting applicable regulating standards.
Reserve Sharing Group Reporting ACE - CORRECT ANSWER-The sum of the
Reporting ACEs of the Balancing Authorities participating in the Regulation
Reserve Sharing Group.
Control Performance Standard (CPS) - CORRECT ANSWER-The Reliability
Standard that sets the limits of a Balancing Authority's Area Control Error over a
specified time period.
Dynamic Schedule - CORRECT ANSWER-A time-varying energy transfer
updated in Real-time and included in the Scheduled Net Interchange (NIs) term
in the affected Balancing Authorities' control ACE equation.
Inadvertent Interchange - CORRECT ANSWER-The difference between the
Balancing Authority's Actual Net Interchange and Scheduled Net Interchange
(NIa - NIs).
Interconnection Time Monitor - CORRECT ANSWER-The Reliability Coordinator,
designated by the NERC Operating Committee, that monitors Time Error and
, initiates and terminates Timer Error Corrections. There is only one
Interconnection Time Monitor in each Interconnection.
Joint Control - CORRECT ANSWER-Automatic Generation Control of Jointly
owned units by two or more Balancing Authorities.
Overlap Regulation Service - CORRECT ANSWER-A method of providing
regulation service in which the Balancing Authority providing the regulation
service incorporates another Balancing Authority's Actual Net Interchange,
Frequency Response, and schedules into the provided Balancing Authority's
AGC/ACE equation.
Pseudo-tie - CORRECT ANSWER-A time-varying energy transfer that is updated
in Real-time and included in the Actual Net Interchange term in the same manner
as a Tie-line in the affected Balancing Authorities' control ACE equation. (A fake
tie-line)
Tie-lines - CORRECT ANSWER-A circuit connecting two Balancing Authority
Areas.
Time Error - CORRECT ANSWER-The difference between the Interconnection
time measured at the Balancing Authorities and the time specified by the
National Institute of Standards and Technology. Time error is caused by the
accumulation of Frequency Error over a given period.
Time Error Correction - CORRECT ANSWER-An offset to the Interconnection's
scheduled frequency to return the Interconnection's Time Error to a
predetermined value.
Epsilon - Sub one (ε1) - CORRECT ANSWER-A constant derived from the
targeted frequency bound. It is the same for every Balancing Authority Area
within an Interconnection and is the limit for determining a Balancing Authority's
compliance with CPS1.
Automatic Time Error Correction (ATEC) - CORRECT ANSWER-A component of
ACE (only done in the Western Interconnection) that modifies the control point for
